JPH11347401A - Absorbent material and absorber for absorption of salt-containing solution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent material and an absorber for absorption of a salt-contg. soln. which has excellent absorption and holding performance for a salt-contg. soln. containing ions of high concn. such as sea water, urine, serum and humor, especially a salt-contg. soln. containing blood. SOLUTION: After paper, cloth or nonwoven fabric is impregnated with a mixture of clay and a hydrophilic polymer or hydrophilic polymer dispersed in water, the paper, cloth or nonwoven fabric is dried to obtain an absorbing material for the purpose above described. The compounding ratio of the hydrophilic polymer is 0.01 to 5 wt.% to water, and the compounding ratio of the clay is 0 to 10 wt.% to the water. Drying is preferably carried out by freeze drying. By the interaction of the hydrophilic polymer, clay, and paper, cloth or nonwoven fabric. the absorbing material absorbs a salt-contg. soln. without being influenced by the ions of high concn. or blood in the salt-contg. soln., and therefore, the material has excellent absorbing and holding performance for a salt-contg. soln., especially a salt-contg. soln. containing blood.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an absorbent material and an absorbent for absorbing a salt-containing solution, and more particularly to seawater,
The present invention relates to an absorbent material and an absorbent for absorbing and retaining a salt-containing solution such as urine, serum solution, body fluid, etc., particularly a salt-containing solution containing blood.

[0002]

2. Description of the Related Art A hydrophilic polymer having a function of absorbing water to form a gel is used for hygiene products,
It is used for various purposes such as medical use, household goods, and food-related uses. In particular, for saline solutions containing blood, hydrophilic polymers are used for sanitary products as absorbent materials for blood and the like.

However, conventional hydrophilic polymers are:
Na ⁺ , K ⁺ , Ca ²⁺ , Mg ²⁺ , for a salt solution containing ions such as Cl ⁻ or a salt solution containing blood,
There is a problem that the absorption performance is remarkably reduced, and sufficient absorption performance is not exhibited.

[0004]

SUMMARY OF THE INVENTION The present invention relates to seawater, urine,
Provided is an absorbent material and an absorbent for absorbing a salt solution having excellent absorption and retention performance with respect to a salt solution containing ions such as serum solution and body fluid at a high concentration, particularly a salt solution containing blood. With the goal.

[0005]

An absorbent material for a salt-containing solution according to the present invention is obtained by impregnating a paper, cloth or nonwoven fabric with a hydrophilic polymer or a mixture of a hydrophilic polymer and clay dispersed in water. It is characterized in that the paper, cloth or non-woven fabric is dried. At this time, the mixing ratio of the hydrophilic polymer is 0.01 to 5% by weight based on the water.
And the mixing ratio of the clay is 0 with respect to the water.
It is preferably from 10 to 10% by weight. Further, it is preferable that the drying is freeze-drying.

According to the present invention, a salt-containing solution, especially blood, is formed by the interaction of a hydrophilic polymer or a hydrophilic polymer and clay impregnated and dried on paper, cloth or non-woven fabric with paper, cloth or non-woven paper. It exerts excellent absorption and retention effects on salt-containing solutions containing.

The absorbent for absorbing a salt-containing solution according to the present invention comprises the above-mentioned absorbent for absorbing a salt-containing solution supported on a liquid-permeable carrier sheet or between carrier sheets. Further, the absorbent for absorbing a salt-containing solution of the present invention may be one in which the absorbing material for absorbing a salt-containing solution is carried between a liquid-permeable carrier sheet and a liquid-impermeable film. . At this time, it is preferable that the liquid-permeable carrier sheet is obtained by impregnating paper, cloth or nonwoven fabric with clay dispersed in water and then drying the paper, cloth or nonwoven fabric.

According to the present invention, since an absorbent material having excellent absorption / retention performance is supported, a salt-containing solution in which ions such as seawater, urine, serum solution, and body fluid are present at a high concentration, particularly a salt-containing solution containing blood. Has excellent absorption and retention performance for solutions.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The absorbent material for a salt-containing solution according to the present invention will be described.

[0010] The absorbent material for a salt-containing solution of the present invention is obtained by impregnating paper, cloth or nonwoven fabric with a hydrophilic polymer dispersed in water or a mixture of a hydrophilic polymer and clay.
It is obtained by drying the paper, cloth or non-woven fabric. That is, the absorbent material of the present invention comprises (1) a hydrophilic polymer or a mixture of a hydrophilic polymer and clay dispersed in water, and (2) a hydrophilic polymer or a hydrophilic polymer dispersed in water and clay. The mixture can be obtained by impregnating the paper, cloth or nonwoven and (3) drying the impregnated paper, cloth or nonwoven.

Hereinafter, the clay, hydrophilic polymer, water, paper, cloth or non-woven fabric used for preparing the absorbent material for the salt-containing solution will be described in detail.

[Clay] As the clay used in the absorbent material, a natural or synthetic inorganic compound mainly composed of hydrated silicate, for example, smectite, vermiculite, mica, chlorite, kaolinite, halloysite, chrysotile, talc, Examples include sepiolite, palygorskite, allophane, imogolite, gypsite, boehmite, goethite, volcanic ash, zeolite, saponite, synthetic aluminum silicate, synthetic calcium silicate, and the like, or a mixture thereof. For absorbent materials used for applications where safety and hygiene are important, such as sanitary products and drip absorbent sheets, kaolinite, talc, bentonite (montmorillonite belonging to smectite) that has passed the Japanese Pharmacopoeia standards are used as clay. Is preferable).

The average particle size of the clay particles is 0.01 μm to 5 μm.
mm, preferably 0.1 μm to 500 μm.

Further, silica, calcium carbonate, quartz, feldspar, cristobalite, titanium oxide,
A mixed clay containing zinc oxide, apatite and the like in the range of 0.1 to 40% by weight can also be used.

[Hydrophilic polymer] Examples of the hydrophilic polymer include starch, hydroxyethylcellulose, carboxymethylcellulose, alginic acid, hyaluronic acid, polyglutamic acid, chitosan, lignin, polylysine, silk fibroin, cargenan, casein, and cellulose glycol derived from natural products. Acids, collagen, gelatin, polymers composed mainly of components obtained from natto, and any one or combination of these metal salts and esters, or chemically synthesized polyvinyl alcohol, polyacrylamide, polyvinyl Pyrrolidone, polyhydroxyethyl acrylate, polyvinyl methyl ether, polyacrylic acid, poly (isobutylene-maleic acid), poly (2-acrylamido-2-methylpropane-sulfonic acid), Poly (acryloxypropanesulfonic acid), polyvinylphosphonic acid, poly (methacryloyloxyethyl quaternary ammonium chloride, polyvinylpyridine, N-N-dimethyl-N- (3-acrylamidopropyl) -N- (carboxymethyl) ammonium , Polyethylene glycol, polydioxysorane, polyethyleneimine, poly (N-vinylacetamide) and any one of these metal salts and esters or a combination thereof can be preferably used.

Particularly, those having a water absorbing ability such as sodium alginate and polyacrylic acid-based water-absorbing polymer are preferable, and sodium alginate derived from natural products is particularly preferable in view of safety and health and biodegradability.

[Water] As the water, various waters such as natural water, distilled water, ion-exchanged water and tap water can be used.
There is no particular limitation. As a special case, when using a mixture of talc and a hydrophilic polymer, for example, by using seawater or water obtained by diluting seawater with natural water or the like as a water for dispersing, an absorbent material having good absorption characteristics Can be obtained.

[Paper, Cloth or Non-Woven Fabric] As the paper, cloth or non-woven fabric, generally used paper, cloth or non-woven fabric can be used, and is not particularly limited, but has many voids such as paper towels and tissue papers. Those are particularly preferably used.

Next, a method of manufacturing the absorbing material will be described.

First, a hydrophilic polymer or a mixture of a hydrophilic polymer and clay (hereinafter referred to as "hydrophilic polymer etc.")
There is that. ) Is dispersed in water to prepare a dispersion solution. The dispersion solution can be prepared by putting a predetermined amount of the hydrophilic polymer or the like weighed into water and stirring the mixture with a usual stirrer such as a mixer. In addition to the hydrophilic polymer and the like, a dispersion solution in which plant natural fibers such as coconut hulls described below are dispersed can be used.

Next, the obtained dispersion solution is placed in a container such as a Petri dish, and a paper, cloth or nonwoven fabric (hereinafter, sometimes referred to as “paper etc.”) is completely immersed therein, and the dispersion is dispersed in water. Paper or the like is impregnated with a hydrophilic polymer or the like. In order to sufficiently impregnate the dispersed hydrophilic polymer or the like into paper or the like, it is usually preferable to leave the paper for about one minute or longer.

Further, the absorbent material of the present invention can be obtained by taking out the impregnated paper or the like from a container such as a petri dish and drying it for a certain period of time. Drying for a certain period of time here is usually performed for 3 hours or more, preferably for 24 hours or more, by natural drying by natural leaving, or by a dryer or the like.
It is preferable to heat dry for not less than time or freeze-dry for not less than 3 hours, preferably not less than 6 hours. In particular, the absorbent material obtained by freeze-drying, compared to the case of natural drying, since water is removed in a frozen state at a low temperature,
Paper or the like impregnated with a hydrophilic polymer or the like can be obtained in a state with many voids, and the absorption performance is further improved.

When preparing the absorbent material, the mixing ratio of the hydrophilic polymer is set to 0.01 to 5% by weight with respect to water, and the mixing ratio of the clay is set to 0 to 10% by weight with respect to water. preferable.

When the water to be used is ordinary natural water, distilled water, ion-exchanged water or tap water (hereinafter, these may be referred to as "natural water"), the mixing ratio is based on natural water or the like. Preferably, the hydrophilic polymer is 0.01 to 1% by weight and the clay is 0 to 10% by weight, and the hydrophilic polymer is 0.05 to 1% by weight and the clay is 0.2 to 10% by weight.
It is particularly preferred to be 3% by weight.

On the other hand, the water used is seawater, artificial seawater, or water similar to seawater containing salt such as salt so as to have a concentration close to that of seawater (hereinafter, these may be referred to as “seawater or the like”). The compounding ratio in the case of is preferably 0.5 to 5% by weight of the hydrophilic polymer, 0 to 10% by weight of the clay, and 0.5 to 3% by weight of the hydrophilic polymer with respect to seawater or the like. It is particularly preferred that the clay be 0 to 3% by weight.

If the compounding ratio of the hydrophilic polymer is less than 0.01% by weight, the obtained absorbent material cannot sufficiently absorb the salt-containing solution. On the other hand, if the mixing ratio of the hydrophilic polymer exceeds 5% by weight, the clay of the gel after being dispersed in water increases, and it is not preferable because the clay cannot be sufficiently impregnated into paper or the like. On the other hand, if the mixing ratio of the clay exceeds 10% by weight, the clay of the gel after being dispersed in water becomes high as in the case of the hydrophilic polymer, and it is not preferable because the gel cannot be sufficiently impregnated into paper or the like.

[0027] In preparing the absorbent material, various natural fibers may be blended in addition to the hydrophilic polymer and the clay to obtain an absorbent material having higher absorption performance. As natural fibers, plant natural fibers such as fir, coconut and peanut can be used, and it is preferable to mix 0.05 to 3% by weight of a fine powder of these natural fibers.

The absorption material thus obtained is converted into a salt-containing solution, especially a salt-containing solution containing blood, by the interaction between the hydrophilic polymer and paper or the like or between the hydrophilic polymer and clay and paper or the like. Exhibits excellent absorption and retention effects. The absorbing material containing clay exhibits an effect of absorbing odor components such as ammonia in urine and deodorizing by interaction between the hydrophilic polymer and the clay.

It is presumed that such absorption / retention effect and deodorization effect involve some form of natural water or seawater in which a hydrophilic polymer or clay is dispersed. That is, the degree of the above-described effects differs depending on the combination of the type of the hydrophilic polymer or the clay with natural water or the like or seawater or the drying method. Table 1 shows combinations that provide particularly excellent effects.

[0030]

[Table 1]

The absorbent material obtained by using the hydrophilic polymer, clay and water shown in Table 1 and freeze-drying as a drying method exhibits more excellent absorption / retention and deodorizing effects. Further, when seawater or the like is used as water, good effects can be exerted by natural drying, which is naturally left in the air, so-called air drying.

As described above, the absorbent material of the present invention can be used for a salt-containing solution in which ions such as seawater, serum solution, body fluid, blood-containing solution (including physiological fluid) and urine exist at a high concentration. It has excellent absorption and retention performance, such as sanitary articles such as disposable diapers and sanitary treatment products, medical use such as medical waste liquid solidification and surgical sheets, soil improvement including seawater, cleaning sheets and pet undersheets, etc. It can be used for various uses such as household goods. In particular, it is extremely suitable for sanitary treatment products for absorbing blood-containing solutions (including physiological fluids), medical waste liquid solidification products, and the like.

Although a polyacrylic acid-based water-absorbing polymer is generally used for sanitary treatment products, the absorbent material for absorbing a salt-containing solution of the present invention is used for absorbing a salt-containing solution containing blood.
Since it has a higher absorption capacity than a polyacrylic acid-based water-absorbing polymer, it is possible to obtain a sanitary article having a thinner thickness and equal or higher absorbency.

The absorbent material of the present invention has excellent ability to absorb odors such as urine, so that it can be used for applications having both a salt solution-absorbing property and a deodorizing property.

Next, the absorber for absorbing a salt-containing solution of the present invention will be described.

The absorbent of the present invention is one in which the above-described absorbent material of the present invention is carried on a liquid-permeable carrier sheet or between carrier sheets. Further, the absorbent for absorbing a salt-containing solution of the present invention may be one in which the absorbing material for absorbing a salt-containing solution is carried between a liquid-permeable carrier sheet and a liquid-impermeable film. . In this case, it is preferable that the liquid-permeable carrier sheet is obtained by impregnating paper, cloth or nonwoven fabric with clay dispersed in water, and then drying the paper, cloth or nonwoven fabric.

FIG. 1 is a schematic sectional view showing an example of the absorber of the present invention. The absorber 1 includes an absorbent layer 4 on a liquid-permeable carrier sheet 2. As the liquid-permeable carrier sheet 2, nonwoven fabric, paper, or the like can be used. Absorption layer 4
, The absorbent material of the present invention is used.

FIG. 2 is a schematic sectional view showing another example of the absorber of the present invention. The absorber 11 includes an absorbing layer 14 between liquid-permeable carrier sheets 12. The liquid-permeable carrier sheet 12 can be the same as the liquid-permeable carrier sheet 2 described above. As the absorbing layer 14, the absorbing material of the present invention is used as in the above-described absorbing layer 4.

As shown in FIG. 2, the absorbent body 11 is provided with an absorbent layer 14 at a predetermined position on the liquid-permeable carrier sheet 12, and then the liquid-permeable carrier sheet 12 is bent into an envelope shape.
It can be formed by providing the absorbing layer 14 between the liquid-permeable carrier sheets 12. Further, an absorbent layer 14 is provided between two liquid-permeable carrier sheets 12 to which at least a part of the periphery of the liquid-permeable carrier sheet 12 is adhered.
Can also be formed.

FIG. 3 is a schematic sectional view showing another example of the absorber of the present invention. The absorber 21 includes an absorbing layer 24 made of the absorbing material of the present invention between the liquid-permeable carrier sheet 22 and the liquid-impermeable film 23. Liquid permeable carrier sheet 2
For 2, a nonwoven fabric, paper, or the like similar to the liquid-permeable carrier sheet 2 described above can be used. In addition, the liquid-impermeable film 2
3 can use a polyethylene sheet, a polyvinyl chloride sheet, a polyvinylidene chloride sheet, a polypropylene sheet or the like. As the absorption layer 24, the absorption material of the present invention is used as in the above-described absorption layers 4 and 14.

The absorber 21 is formed by stacking a liquid-permeable carrier sheet 22 and a liquid-impermeable film 23, bonding at least a part of the periphery of the superposed carrier sheets 22 and 23, and bonding the carrier sheets 22 and 23 to each other. It can be formed by providing an absorbing layer 24 between the two.

As an example of the use of such an absorber 21, as shown by an imaginary line in FIG. 3, the absorbent sheet 21 is placed on a styrofoam tray 31 so that the liquid-permeable carrier sheet 22 is on the lower side. The frozen meat 32 or the frozen fish can be placed on the liquid-permeable film 23 and used. Accordingly, it is possible to use the frozen meat 32 or the frozen fish without directly contacting the absorbent layer 24, and the drip generated by the thawing proceeds flows on the liquid-impermeable film 23 and the peripheral portion of the absorbent 21 Thereafter, the liquid is passed through the liquid-permeable carrier sheet 22 and absorbed by the absorbing layer 24. Therefore, the thawed meat or fish is not soaked in the drip for a long time, and the trip is not forcibly sucked from the meat or fish, so that the ideal thawed state can be maintained.

FIG. 4 is a schematic sectional view showing another example of the absorber of the present invention. The absorber 41 is formed by laminating a liquid-permeable carrier sheet 42 and an absorption layer 44. The liquid-permeable carrier sheet 42 used here is obtained by impregnating paper, cloth or nonwoven fabric with water dispersed clay and then drying the paper, cloth or nonwoven fabric. Drying at this time can be performed by natural drying, so-called air drying, or cold air drying or hot air drying using a dryer or the like. As the clay, among the above-mentioned clays, bentonite, kaolinite, talc or a mixture thereof can be particularly preferably used. The mixing ratio of clay dispersed in water is preferably from 0.1 to 10% by weight, particularly preferably from 0.5 to 3% by weight, based on water. In addition, as the absorption layer 44, the above-mentioned absorption layers 4, 14, 24
Similarly to the above, the absorbent material of the present invention is used.

The liquid-permeable carrier sheet 42 thus obtained
Are the liquid-permeable carrier sheets 2, 12, shown in FIGS.
22 can be used instead. Obtained absorber 4
When the salt-containing solution containing blood is dropped onto the liquid-permeable carrier sheet 42, the salt-containing solution containing blood permeates into the liquid-permeable carrier sheet 42, and the permeated liquid-permeable carrier Sheet 42
The contact area at a stretch increases. Furthermore, many of the high molecular components and many of the salts in the blood are absorbed by the liquid-permeable carrier sheet. As a result, the absorbing layer 44 efficiently absorbs the salt-containing solution, which penetrates and expands into the liquid-permeable carrier sheet 42 and has a reduced concentration of the polymer component and salt, from the liquid-permeable carrier sheet 42. Therefore, by providing the liquid-permeable carrier sheet 42, the absorption capacity of the absorber 41 can be significantly improved.

Further, in the production of the absorbent body 41 shown in FIG. 4, after the paper, cloth or nonwoven fabric is impregnated with the above-mentioned liquid-permeable carrier sheet 42 (ie, clay dispersed in water, the paper, cloth or nonwoven fabric). The dried nonwoven fabric is prepared in advance, and then dried after impregnating paper or the like with a hydrophilic polymer dispersed in natural water or the like or sea water or a mixture of the hydrophilic polymer and clay. On the absorbent layer in the state of (1), the previously prepared liquid-permeable carrier sheet 42 is placed from above and overlapped, and then, the dried liquid-permeable carrier sheet 42 before drying is placed thereon. By freeze-drying the absorbent layer in the state, the absorbent 41 in which the liquid-permeable carrier sheet 42 and the absorbent layer 44 are integrated can be produced.

In the absorbent body 41 thus manufactured, the gap between the liquid-permeable carrier sheet 42 and the absorbing layer 44 is smaller than that of the above-mentioned absorbent body 41 which is not integrated. When the salt solution containing blood is dropped, the salt solution containing blood easily penetrates into the liquid-permeable carrier sheet 42 and the integrated absorption layer 44 while the contact area is enlarged.
It exhibited excellent absorption performance of being absorbed very quickly inside.

FIG. 5 is a schematic sectional view showing an example when the absorbent of the present invention is used as a sanitary treatment product. The absorber 51 is
The mesh film 5 is used as a sanitary treatment product, and is provided with a liquid-impermeable mesh film 5 from the contact surface side with which the physiological fluid comes into contact.
5, liquid permeable sheet 52 ', absorption layer 54, liquid permeable sheet 5
2 ”and the liquid-impermeable film 53 in this order.

As the liquid-impervious mesh film 55 that comes into contact with the physiological fluid containing blood first, a conventionally known one can be used, and it is not particularly limited. Since the liquid-impervious mesh film 55 has a mesh shape, it can transmit physiological fluid but repels itself. Therefore, on the back side of the liquid-impermeable mesh film 55, an absorbent layer,
For example, by providing the liquid-permeable carrier sheet 52 'and the absorbing layer 54, the physiological fluid can be absorbed without staying in the liquid-impermeable mesh film 55 on the contact surface side.

The liquid-permeable carrier sheet 52 ′ is provided on the back side of the liquid-impermeable mesh film 55 and is made of paper or the liquid-permeable carrier sheet 42 shown in FIG. 4, ie, paper impregnated with clay. Is used. In particular, when the liquid-permeable carrier sheet 42 shown in FIG. 4 is used as the liquid-permeable carrier sheet 52 ′, the physiological fluid easily penetrates into the liquid-permeable carrier sheet 52 ′ as described above. However, since the contact area increases at a stretch, the amount of physiological fluid that remains in the liquid-impermeable mesh film 55 can be reduced, which is preferable.

The absorbing layer 54 is formed of a liquid-permeable carrier sheet 52 ′.
And the above-described absorption layers 4, 14, 24, 4
As in the case of No. 4, it is formed by the absorbent material of the present invention. The absorption layer 54 absorbs the physiological fluid expanded in the liquid-permeable carrier sheet 52 'by its excellent absorption performance.
Almost all physiological fluids retained in the liquid-impermeable mesh film 55 can be absorbed. Furthermore, since the physiological fluid that has permeated and expanded into the liquid-permeable sheet 52 'can be sufficiently absorbed and the contact surface side of the sanitary treatment product can be dried quickly, a physiological treatment product excellent in use mode and feeling can be obtained. can do.

By using the liquid-permeable carrier sheet 52 ′ and the absorbent layer 54 as the above-mentioned integrated absorbent 41 (see FIG. 4), the physiological fluid can be absorbed more quickly. it can. As a result, the physiological fluid is quickly absorbed into the integrated absorbent body 41 without staying in the liquid-impermeable mesh film 55, and the contact surface side of the sanitary treatment article can be dried more quickly. A sanitary treatment article excellent in use mode and feeling can be obtained.

The liquid-permeable carrier sheet 52 ″ is
, And is usually made of paper. But,
Since the absorbent layer 54 made of the absorbent material of the present invention has excellent absorption performance for physiological fluid, it can function as a sanitary treatment article without providing the liquid-permeable carrier sheet 52 ″.

A conventionally known liquid impermeable film 53 can be used. Usually, polyethylene or the like is used.

Further, between the liquid-impermeable mesh film 55 and the liquid-permeable carrier sheet 52 ′, a porous and uneven film made of a liquid-impermeable material such as polypropylene is provided. Can be. FIG. 6 shows a porous and uneven film 62 made of a liquid-impermeable material (hereinafter, referred to as a “liquid-impermeable uneven film 62”), which is combined with a liquid-impermeable mesh film 55 and a liquid-permeable mesh film 55. It is a sectional enlarged view showing an example of absorber 61 provided between carrier sheet 52 '. As shown in FIG. 6, the liquid-impermeable uneven film 62 has convex portions 63.
So that the side is the liquid-impermeable mesh film 55 side,
It is preferable that they are placed on a liquid-permeable carrier sheet 52 'and overlapped. When the physiological fluid comes into contact with the absorber 61, the physiological fluid that has passed through the liquid-impermeable mesh film 55 quickly reaches the concave portion 64 through the convex portion 63 of the liquid-impermeable uneven film 62. Then, the physiological fluid that has reached the concave portion 64 is easily absorbed by the liquid-permeable carrier sheet 52 ′ and the absorbing layer 54 as described above. Therefore, by providing such a liquid-impermeable uneven film 62, the physiological fluid is more rapidly absorbed, so that the physiological fluid does not stay on the contact surface side, and is a physiological treatment article excellent in use feeling. be able to. In addition, the physiological fluid that has reached the concave portion 64 is easily absorbed by the absorbent layer 54 and the like, so that the return to the convex portion 63 side is small, and the contact surface side of the absorber 61 dries more quickly. Further, since a void 65 is formed between the liquid-impermeable mesh film 55 and the liquid-permeable carrier sheet 52 'as shown in FIG. it can. The liquid-impervious uneven film 62 is obtained by pressing a porous film made of a liquid-impervious material, usually using a mold having convex portions, and FIG. The irregularities shown are formed.

Since the sanitary treatment product obtained as described above has an excellent physiological fluid absorption performance, the contact surface side can be dried quickly, and its use feeling is higher than conventional sanitary treatment products. Is much better.

[0056]

Next, the present invention will be described in more detail with reference to specific examples.

Example 1 Various hydrophilic polymers, clay and natural vegetable fibers were dispersed in 100 ml of distilled water at the compounding ratios shown in Table 2 to prepare respective dispersions.
Next, each dispersion was placed in a Petri dish, and 1
A nonwoven paper towel having a size of 2 cm × 7 cm × thickness of 1 mm was immersed for 1 minute. At this time, the nonwoven fabric paper towel was impregnated with a dispersion of a hydrophilic polymer, clay, or the like by dipping. Thereafter, the nonwoven paper towel was freeze-dried for 8 hours to obtain the absorbent sheets of Samples 1 to 7, which are the absorbent materials of the present invention. 200 μl of pig blood was dropped on the absorption sheets of the obtained samples 1 to 7, and their absorption characteristics were evaluated. Table 2 shows the results.

[0058]

[Table 2]

For comparison, polyacrylic acid-based water-absorbing polymer particles were placed on a paper substrate, which is a usual absorbent material, by 1c.
0.005 g per m < ² > was sprayed and then pressed with a roller to obtain an absorbent sheet of Comparative Sample 1. In the same manner as described above, pig blood 200
μl was added dropwise to evaluate the absorption characteristics. Table 2 shows the results.

Example 2 Various hydrophilic polymers and clays were dispersed in 100 ml of seawater at the compounding ratios shown in Table 3 to prepare respective dispersions. Next, each dispersion was placed in a petri dish, and a 12 cm × 7 cm × 1 mm thick nonwoven paper towel was immersed in the dispersion for 1 minute. At this time, the nonwoven paper towel was impregnated with the dispersion of the hydrophilic polymer and clay by dipping. Thereafter, the nonwoven fabric paper towel was air-dried (so-called air-drying) by leaving it to stand for 24 hours to obtain absorption sheets of Samples 8 to 10 as the absorption material of the present invention. Pig blood 2 was placed on the absorption sheets of Samples 8 to 10 obtained.
00 μl was added dropwise to evaluate the respective absorption characteristics. Table 3 shows the results.

[0061]

[Table 3]

[0062] For comparison, on the paper substrate is an ordinary absorbent material is coated with a hot melt adhesive, 1 cm ² per 0 polyacrylate type water-absorbing polymer particles thereon.
Then, 005 g of the dispersion sheet was sprayed, and then pressed with a roller to obtain an absorbent sheet of Comparative Sample 2. In the same manner as described above, 200 μl of pig blood was dropped onto the absorption sheet of Comparative Sample 2 to evaluate the absorption characteristics. Table 3 shows the results.

Example 3 18 cm × 7 cm × 1 m thick
The same absorbent sheet as that of the above-mentioned sample 3, which is the absorbent material of the present invention, was obtained in the same manner as in Example 1 using a nonwoven paper towel of m. The obtained absorbent sheet,
The sample was placed on a 21.5 cm × 9 cm polyethylene film which was a liquid impermeable film.

Next, 1% by weight of bentonite was used as clay.
To prepare a dispersion. Put the dispersion in a Petri dish and add 18cm ×
7 cm × 1 mm thick paper was immersed for 1 minute. At this time, the paper was impregnated with the clay dispersion by immersion. Thereafter, the paper was air-dried (so-called air-drying) by leaving it to stand for 6 hours to obtain a liquid-permeable carrier sheet. The obtained liquid-permeable carrier sheet was placed on the above-mentioned absorbent sheet. Further, a polyethylene mesh of 21.5 cm × 9 cm × 1 mm, which is a liquid-impermeable mesh film, was covered thereover. After the sheets were overlapped in this way, a polyethylene mesh as a liquid-impermeable mesh film and a polyethylene film as a liquid-impermeable film were fused to obtain an absorber of the present invention.

Next, an absorber for comparison was prepared. First, the same absorbent material as Comparative Sample 1 used in Example 1 was used.
An absorbent was obtained by producing a sheet having a size of 18 cm × 7 cm × 1 mm in thickness. This absorbent sheet is sandwiched between two 18 cm × 7 cm × 1 mm thick water-permeable paper sheets, which are liquid-permeable carrier sheets, and they are sandwiched between 21.5c liquid-impervious films.
It was mounted on an mx 9 cm polyethylene film. From there, 21.5c which is a liquid-impermeable mesh film
A polyethylene mesh measuring mx 9 cm x 1 mm was covered. After the sheets were stacked in this manner, a polyethylene mesh as a liquid-impermeable mesh film and a polyethylene film as a liquid-impermeable film were fused to obtain an absorber for comparison.

While the obtained absorber for comparison with the absorber of the present invention was kept in tension by pulling both ends thereof, 2 ml of pig blood was dropped at a time to evaluate the absorption characteristics. did. Table 4 shows the results.

[0067]

[Table 4]

As is evident from Table 4, the absorbent of the present invention was extremely excellent in blood absorbability and was extremely excellent as a sanitary treatment product.

Example 4 Kaolinite as Clay 1
A dispersion was prepared by dispersing in distilled water at a blending ratio of% by weight. The dispersion is placed in a Petri dish, and 18
A nonwoven paper towel measuring 7 cm x 7 cm x 1 mm was soaked for 1 minute. At this time, the non-woven paper towel was impregnated with the clay dispersion by dipping. Thereafter, the paper towel was air-dried (so-called air-drying) by leaving it to stand naturally for 6 hours to obtain a liquid-permeable carrier sheet.

Next, 2.0% by weight of kaolinite as a clay and 0.2% by weight of a polyacrylic acid water-absorbing polymer as a hydrophilic polymer were dispersed in 100 ml of distilled water to prepare a dispersion. The dispersion was placed in a petri dish, and a nonwoven paper towel having a size of 18 cm × 7 cm × 1 mm was immersed in the dispersion for 1 minute. At this time, the nonwoven paper towel was impregnated with the clay and the hydrophilic polymer by dipping. Then, the non-woven paper towel impregnated with the clay and the hydrophilic polymer is taken out of the dispersion, and immediately thereafter, the previously prepared liquid-permeable carrier sheet is placed from above and overlapped. Then, the liquid-permeable carrier sheet and the absorbent layer are integrated by freeze-drying the laminated liquid-permeable carrier sheet and a nonwoven paper towel impregnated with clay and a hydrophilic polymer as the absorbing layer. The obtained absorbent sheet was obtained.

The absorbent sheet thus obtained was placed on a 21.5 cm × 9 cm polyethylene film which was a liquid impermeable film. Furthermore, from above, a liquid-impermeable mesh film of 21.5 cm × 9 cm × 1 m thick
m of polyethylene mesh. After the sheets were overlapped in this way, a polyethylene mesh as a liquid-impermeable mesh film and a polyethylene film as a liquid-impermeable film were fused to obtain an absorber of the present invention.

While holding the obtained absorber of the present invention under tension by pulling both ends thereof, the pig blood 2
ml was dropped at a time to evaluate the absorption characteristics. Table 5 shows the results
Shown in

[0073]

[Table 5]

As is clear from Table 5, the absorbent of the present invention was extremely excellent in blood absorbability and was extremely excellent as a sanitary treatment product.

Example 5 9 cm × 7 cm × 1 mm thick
The same absorbent sheet as that of Sample 6 was obtained in the same manner as in Example 1 by using the nonwoven paper towel of Example 1. The obtained absorbent sheet was used as a liquid-permeable carrier sheet for 9.5.
The sample was placed on a nonwoven fabric measuring cm × 7.5 cm × 1 mm in thickness.
Next, a 13 cm × 9.5 cm × 0.3 mm thick polyethylene film, which is a liquid-impermeable film, was stacked on the absorbent sheet so as to cover the absorbent sheet from above. After the sheets were stacked in this way, the polyethylene film as a liquid-impermeable film and the nonwoven fabric as a liquid-permeable carrier sheet were bonded to obtain an absorber of the present invention as shown in FIG.

An absorber for comparison was produced by the same method as described above. As an absorbent sheet, an absorbent sheet similar to Comparative Sample 1 was obtained in the same manner as in Example 1. Using the obtained absorbent sheet, an absorbent for comparison was obtained in the same manner as described above.

The thus-obtained absorber of the present invention and the absorber for comparison were each mounted on polystyrene foam. At this time, the polyethylene film, which is a liquid-impermeable film, was placed on top. 100 g of frozen squid on this absorber
And then thawed at room temperature for 3 hours, and the fish juice absorbability was evaluated according to the following criteria. The taste of the squid cooked after thawing was evaluated, and the results are shown in Table 6.

Evaluation criteria for fish juice absorbability: ：: The resulting fish juice was absorbed by the absorber and was not seen on the tray. Δ: A part of the generated fish juice was absorbed by the absorber, but the tray Residual fish juice was observed on the top. ×: The resulting fish juice was not absorbed by the absorber and accumulated on the tray.

[0079]

[Table 6]

[0080]

As described above, the absorbing material of the present invention is characterized by the fact that ions or blood present in a high concentration in a salt-containing solution are formed by the interaction of a hydrophilic polymer, clay and paper, cloth or nonwoven fabric. It absorbs a salt-containing solution without being affected by water, and therefore has excellent absorption and retention performance with respect to a salt-containing solution, particularly a salt-containing solution containing blood.

Further, according to the absorber of the present invention, since the absorber is formed by using an absorbent material having a high absorption performance with respect to a salt-containing solution, ions of seawater, urine, serum solution, body fluid, etc., are high. It becomes possible to obtain an absorbent having excellent absorption / retention performance for a salt-containing solution existing at a concentration, particularly for a salt-containing solution containing blood.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one example of an absorber of the present invention.

FIG. 2 is a cross-sectional view showing another example of the absorber of the present invention.

FIG. 3 is a cross-sectional view showing still another example of the absorber of the present invention.

FIG. 4 is a sectional view showing still another example of the absorber of the present invention.

FIG. 5 is a cross-sectional view showing an example when the absorbent of the present invention is used as a sanitary treatment product.

FIG. 6 is an enlarged cross-sectional view showing an example of an absorber provided with a liquid-impermeable uneven film between a liquid-impermeable mesh film and a liquid-permeable carrier sheet.

[Explanation of symbols]

 1, 11, 21, 41, 51, 61 Absorber 2, 12, 22, 52 Liquid-permeable carrier sheet 4, 14, 24, 44, 54 Absorbing layer 23, 53 Liquid-impermeable film 52 'Liquid-permeable 52 ”liquid-permeable carrier sheet (non-contact surface side: lower side) 55 liquid-permeable mesh film 62 liquid-impermeable uneven film 63 convex portion 64 concave portion 65 void part

Claims (6)

[Claims] 1. A paper, cloth or nonwoven fabric impregnated with a hydrophilic polymer or a mixture of a hydrophilic polymer and clay dispersed in water, and then the paper, cloth or nonwoven fabric is dried to absorb a salt-containing solution. For absorbent material. 2. The compounding ratio of the hydrophilic polymer is 0.01 to 5% by weight based on the water, and the compounding ratio of the clay is 0 to 10% by weight based on the water. The absorbent material for absorbing a salt-containing solution according to claim 1, wherein: 3. The absorbent material for absorbing a salt-containing solution according to claim 1, wherein the drying is freeze-drying. 4. An absorber for absorbing a salt-containing solution, wherein the absorbent material according to claim 1 is carried on a liquid-permeable carrier sheet or between carrier sheets. . 5. An absorbent for absorbing a salt-containing solution, wherein the absorbent material according to claim 1 is carried between a liquid-permeable carrier sheet and a liquid-impermeable film. Absorber. 6. The paper, wherein the liquid-permeable carrier sheet is formed by impregnating paper, cloth or nonwoven fabric with clay dispersed in water.
The absorbent for absorbing a salt-containing solution according to claim 4 or 5, wherein the cloth or nonwoven fabric is dried.